101030640 has 160 divisors (see below), whose sum is σ = 326217216. Its totient is φ = 25850880.

The previous prime is 101030639. The next prime is 101030647. The reversal of 101030640 is 46030101.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101030647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 980829 + ... + 980931.

Almost surely, 2^101030640 is an apocalyptic number.

101030640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101030640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163108608).

101030640 is an abundant number, since it is smaller than the sum of its proper divisors (225186576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101030640 is a wasteful number, since it uses less digits than its factorization.

101030640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 101030640 is about 10051.3999025011. The cubic root of 101030640 is about 465.7480386829.

101030640 divided by its sum of digits (15) gives a palindrome (6735376).

Adding to 101030640 its reverse (46030101), we get a palindrome (147060741).

The spelling of 101030640 in words is "one hundred one million, thirty thousand, six hundred forty".